#include<stdio.h>
int main()
{
	char ch1='e',ch2='l',ch3='o';
	char ch4='\101',ch5='\102',ch6='\103';
	printf("h%cl%c%c\tworld\n",ch1,ch2,ch3);
	printf("%c%c\b\b%c\n",ch4,ch5,ch6);
	return 0;
}
